Well at the moment I'm still using XP. XP works good and will be supported for still a few years. But I'm prefering Vista more and more. Of course it needs a higher equipped hardware than XP and it's pretty expensive so far, but apart from this I like it. By the way most of the driver problems are fixed up to now. And SP1 was also a step in the right direction...

Vista is basically good as far as what I do with my computer. The only thing that bothers me is the incompatibility between some multimedia files and the system. So basically, I recommend it if your PC has a good or even high performance.